/* 51吃瓜 · Cloud-white editorial matrix */
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a{display:inline-block;color:var(--mauve-deep);font-size:11px;margin-top:10px}.aside-line{height:1px;background:var(--line);margin:20px 0}.editorial-split{display:grid;grid-template-columns:.8fr 1.3fr;gap:45px;align-items:start}.editorial-quote{padding:30px;background:#fff;border-radius:16px;border:1px solid var(--line);min-height:270px}.quote-mark{font-family:Georgia;font-size:60px;line-height:.8;color:var(--rose)}.editorial-quote h3{font-size:25px;line-height:1.5;margin:12px 0}.editorial-quote p{color:var(--ink-2);font-size:13px}.editorial-quote a{color:var(--mauve-deep);font-size:12px}.editorial-list-item{display:grid;grid-template-columns:36px 1fr 20px;gap:16px;padding:17px 0;border-bottom:1px solid var(--line);align-items:start}.editorial-list-item>span{color:var(--rose);font-size:12px;font-weight:800}.editorial-list-item small{font-size:10px;color:var(--mauve-deep)}.editorial-list-item h3{font-size:17px;margin:3px 0}.editorial-list-item 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h3{font-size:16px;margin:8px 0}.timeline-copy p{font-size:12px;color:var(--ink-2)}.relation-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:center}.relation-layout p{color:var(--ink-2);font-size:13px;line-height:2}.relation-map{height:300px;position:relative;display:grid;place-items:center}.relation-node{position:absolute;padding:11px 18px;background:#fff;border:1px solid #c7dce4;border-radius:9px;font-size:11px;z-index:2;box-shadow:var(--shadow)}.relation-node.center{background:var(--plum);color:#fff;border-color:var(--plum);padding:19px 27px;border-radius:50%}.n1{top:12%;left:8%}.n2{top:14%;right:8%}.n3{bottom:13%;left:10%}.n4{bottom:12%;right:8%}.relation-line{position:absolute;width:38%;height:1px;background:#a8cbd4;transform-origin:center}.l1{transform:rotate(34deg) translateY(-70px)}.l2{transform:rotate(-34deg) translateY(-70px)}.l3{transform:rotate(-34deg) translateY(70px)}.l4{transform:rotate(34deg) translateY(70px)}.reading-rows{border-top:1px solid var(--line)}.reading-row{display:grid;grid-template-columns:55px 190px 1fr 80px;align-items:center;gap:15px;padding:17px 4px;border-bottom:1px solid var(--line)}.reading-row>span{color:var(--rose);font-size:11px;font-weight:800}.reading-row strong{font-size:14px}.reading-row p{font-size:12px;color:var(--ink-2);margin:0}.reading-row b{font-size:11px;color:var(--mauve-deep);text-align:right}.people-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.people-strip article{display:flex;gap:15px;background:#fff;border:1px solid var(--line);padding:18px;border-radius:13px}.avatar-letter{display:grid;place-items:center;flex:0 0 42px;height:42px;border-radius:13px;background:var(--lavender-soft);color:var(--mauve-deep);font-weight:800}.people-strip h3{font-size:14px;margin:0}.people-strip small{font-size:10px;color:var(--mauve-deep)}.people-strip p{font-size:11px;color:var(--ink-2);margin:7px 0 0}.trust-layout{display:grid;grid-template-columns:1fr 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0}.series-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.series-grid>a{padding:25px;background:#fff;border:1px solid var(--line);border-radius:14px}.series-grid span{font-size:9px;letter-spacing:1.2px;color:var(--mauve-deep)}.series-grid h3{font-size:19px;margin:18px 0 6px}.series-grid p{font-size:12px;color:var(--ink-2)}.series-grid b{font-size:11px;color:var(--mauve-deep)}.contributor-band p{max-width:620px;color:#bdcad6;font-size:13px}.app-preview{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.app-preview p{font-size:13px;color:var(--ink-2);max-width:540px}.device-art{height:260px;background:linear-gradient(135deg,#eaf6f8,#dce9f1);border-radius:18px;display:grid;place-items:center;position:relative;overflow:hidden}.device-screen{width:155px;height:220px;background:var(--plum);border:6px solid #fff;border-radius:23px;box-shadow:0 18px 40px #203a5830;padding:22px 15px;color:#fff;display:flex;flex-direction:column;gap:13px;transform:rotate(-7deg)}.device-screen span{font-size:20px;font-weight:800}.device-screen b{font-size:13px}.device-screen i{height:7px;border-radius:5px;background:#ffffff30}.device-screen i:nth-of-type(2){width:75%}.device-screen small{font-size:8px;color:#9de2e4;margin-top:auto}.device-caption{position:absolute;right:22px;bottom:18px;font-size:9px;letter-spacing:1.5px;color:var(--ink-3)}.download-actions{display:grid;gap:12px;min-width:210px}.download-actions a{font-size:12px;color:var(--mauve-deep);border-bottom:1px solid var(--line);padding:10px 0}.privacy-card{padding:28px;background:#fff;border:1px solid var(--line);border-radius:15px}.privacy-card>div{max-width:760px}.privacy-card h2{font-size:25px}.privacy-card p{margin:0}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line);padding:0 3px}.faq-list summary{list-style:none;display:flex;align-items:center;gap:15px;padding:17px 0;font-size:14px;font-weight:650;cursor:pointer}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary span{color:var(--rose);font-size:10px}.faq-list summary b{margin-left:auto;color:var(--mauve-deep);font-size:18px}.faq-list details[open] summary b{transform:rotate(45deg)}.faq-list details p{margin:0 35px 18px;color:var(--ink-2);font-size:12px;max-width:900px}.bottom-cta{margin-top:15px;margin-bottom:80px;padding:34px 40px;background:linear-gradient(120deg,#10243b,#203a58);color:#fff;border-radius:18px;display:flex;align-items:center;justify-content:space-between}.bottom-cta .eyebrow{color:#82d7de}.bottom-cta h2{margin:7px 0;font-size:28px}.bottom-cta p{color:#bdcad6;margin:0;font-size:12px}
.page-hero{padding:62px 0 58px;background:linear-gradient(125deg,#f7f9fc,#eaf6f8 70%,#e5edf5);border-bottom:1px solid var(--line)}.page-hero-inner{display:grid;grid-template-columns:1.3fr .7fr;gap:60px;align-items:center}.breadcrumbs{display:flex;gap:9px;color:var(--ink-3);font-size:11px;margin-bottom:28px}.breadcrumbs a{color:var(--mauve-deep)}.page-hero h1{font-size:clamp(36px,4vw,54px);letter-spacing:-1.8px;line-height:1.2;margin:14px 0}.lead{font-size:15px;color:var(--ink-2);line-height:2;max-width:750px}.hero-note{padding:25px 27px;background:#fff;border:1px solid #fff;border-radius:15px;box-shadow:var(--shadow)}.note-index{display:block;font-size:36px;color:var(--rose);font-weight:800}.hero-note strong{font-size:17px}.hero-note p{font-size:12px;color:var(--ink-2)}.note-rule{height:1px;background:var(--line);margin:18px 0}.hero-note small{font-size:10px;color:var(--mauve-deep)}.prose-section{display:grid;grid-template-columns:.75fr 1.25fr;gap:60px;padding-top:65px;padding-bottom:30px}.prose-lead h2{font-size:27px;line-height:1.45;margin:12px 0}.prose-copy p{font-size:13px;color:var(--ink-2);line-height:2;margin:0 0 13px}.editorial-blocks{padding-top:30px;padding-bottom:40px}.editorial-row{display:grid;grid-template-columns:60px .9fr 1.1fr;gap:25px;padding:25px 0;border-bottom:1px solid var(--line);align-items:start}.row-number{font-size:13px;color:var(--rose);font-weight:800}.editorial-row h2{font-size:20px;margin:7px 0}.editorial-row p{font-size:13px;color:var(--ink-2);margin:0;line-height:1.9}.content-section.wrap{padding-top:65px;padding-bottom:65px}.detail-note{display:flex;gap:18px;align-items:flex-start;padding:24px 28px;background:#eaf6f8;border-radius:14px;margin-top:20px;margin-bottom:40px}.detail-note-mark{display:grid;place-items:center;flex:0 0 32px;height:32px;border-radius:50%;background:#fff;color:var(--mauve-deep);font-weight:800}.detail-note h2{font-size:16px;margin:0 0 5px}.detail-note p{font-size:12px;color:var(--ink-2);margin:0}.info-band{padding:32px 38px;background:var(--plum);color:#fff;border-radius:16px;display:flex;align-items:center;justify-content:space-between;gap:40px;margin-top:30px;margin-bottom:75px}.info-band .eyebrow{color:#82d7de}.info-band h2{font-size:25px;margin:8px 0}.info-band p{font-size:12px;color:#c4d1dd;max-width:760px;margin:0}.info-band .button{white-space:nowrap}.empty-state{text-align:center;padding-top:90px;padding-bottom:110px}.empty-code{font-size:130px;font-weight:800;color:#d8e7ed;line-height:1.2}.empty-state h1{font-size:32px}.empty-state p{color:var(--ink-2);margin-bottom:25px}.reader-tools{display:flex;gap:12px;align-items:center;padding:20px 0}.reader-tools button{border:1px solid var(--line-strong);background:#fff;padding:9px 14px;border-radius:8px;font-size:12px}.reader-tools span{font-size:11px;color:var(--ink-3)}.site-footer{background:linear-gradient(135deg,#10243b,#203a58);color:#fff;padding:55px 0 18px}.footer-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:50px;padding-bottom:40px}.brand-invert{color:#fff}.brand-invert .brand-mark{background:#fff;color:var(--plum)}.footer-brand p{font-size:12px;line-height:1.9;color:#bdcad6;max-width:330px;margin-top:18px}.footer-grid h3{font-size:13px;margin:4px 0 15px}.footer-grid>div:not(:first-child){display:flex;flex-direction:column;gap:9px}.footer-grid>div>a{font-size:11px;color:#bdcad6}.footer-grid>div>a:hover{color:#82d7de}.footer-bottom{border-top:1px solid #ffffff25;padding-top:16px;display:flex;justify-content:space-between;gap:15px;color:#bdcad6;font-size:10px}.footer-bottom a{color:#82d7de}.search-modal{position:fixed;inset:0;z-index:100;display:none;align-items:flex-start;justify-content:center;padding:13vh 20px 30px}.search-modal.is-open{display:flex}.search-modal[hidden]{display:none!important}.search-backdrop{position:absolute;inset:0;background:rgba(12,30,49,.66);backdrop-filter:blur(4px)}.search-dialog{position:relative;width:min(650px,100%);padding:36px;background:#fff;border-radius:18px;box-shadow:0 25px 90px #071a2b55}.modal-close{position:absolute;right:18px;top:13px;border:0;background:transparent;font-size:26px;color:var(--ink-3)}.search-dialog h2{font-size:27px;margin:9px 0 22px}.search-form{display:flex;gap:8px}.search-form input{flex:1;min-width:0;border:1px solid var(--line-strong);border-radius:8px;padding:11px 13px;outline-color:var(--mauve)}.search-hot{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:18px;font-size:11px}.search-hot span{color:var(--ink-3)}.search-hot a{color:var(--mauve-deep)}[data-reveal]{opacity:1;transform:none}.js-ready [data-reveal]{animation:rise-in .55s both}@keyframes rise-in{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1120px){.desktop-nav{gap:12px}.desktop-nav a{font-size:12px}.header-inner{gap:18px}.hero-layout{gap:30px}.topic-tile{grid-column:span 3}.topic-tile:nth-child(4){grid-column:span 3}.footer-grid{gap:30px}}
@media(max-width:900px){.wrap{width:min(100% - 40px,var(--wrap))}.desktop-nav,.header-save{display:none}.menu-toggle{display:block}.mobile-nav:not([hidden]){display:block;position:absolute;top:72px;left:0;right:0}.hero-layout{grid-template-columns:1fr;gap:0}.hero-main{padding:38px 0 20px}.hero-side{padding:15px 0 25px}.radar-panel{max-width:none}.hero-side-foot{display:none}.home-intro{grid-template-columns:1fr 1.4fr;gap:25px;padding-block:60px}.round-link{display:none}.feature-mosaic,.editorial-split,.relation-layout,.trust-layout,.community-preview,.app-preview,.topic-longread{grid-template-columns:1fr}.mosaic-aside{display:grid;grid-template-columns:1fr 1fr;gap:8px 20px}.aside-line{display:none}.status-columns{grid-template-columns:repeat(2,1fr)}.timeline-copy{grid-template-columns:repeat(2,1fr);row-gap:30px}.people-strip{grid-template-columns:1fr}.page-hero-inner{grid-template-columns:1fr;gap:25px}.hero-note{max-width:600px}.prose-section{grid-template-columns:1fr;gap:12px}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:span 2}.editorial-row{grid-template-columns:40px 1fr}.editorial-row p{grid-column:2}.series-grid{grid-template-columns:1fr 1fr}.brand-intent,.keyword-section,.updates-strip,.download-help,.privacy-card,.faq-home-head,.contributor-band{align-items:flex-start;flex-direction:column;gap:15px}.reading-row{grid-template-columns:35px 150px 1fr}.reading-row b{display:none}}
@media(max-width:600px){body{font-size:14px}.wrap{width:calc(100% - 32px)}.site-header{height:64px}.header-inner{gap:10px}.brand{font-size:16px}.brand-mark{width:31px;height:31px}.brand small{display:none}.header-actions{margin-left:auto;gap:7px}.app-link{padding:7px 12px}.mobile-nav:not([hidden]){top:64px}.home-hero{padding-top:12px}.hero-main{padding:34px 0 17px}.hero-main h1{font-size:45px;letter-spacing:-2px}.hero-main h1 em{font-size:.5em;letter-spacing:-.7px}.hero-copy{font-size:13px}.hero-search{height:52px;padding-left:12px}.hero-search input{font-size:12px}.hero-search button{padding:9px 11px;font-size:11px}.hero-quick{gap:10px;font-size:10px}.hero-actions{flex-wrap:wrap}.button{min-height:41px;padding:9px 13px;font-size:12px}.radar-panel{padding:17px}.radar-feature h2{font-size:24px}.ticker{gap:17px}.home-intro{grid-template-columns:1fr;gap:12px;padding-block:48px}.home-intro h2{font-size:29px}.home-intro>p{font-size:12px}.content-section,.content-section.wrap{padding-block:48px}.section-heading h2{font-size:25px}.split-heading{align-items:flex-start;flex-direction:column;gap:12px}.mosaic-lead{min-height:330px;padding:22px}.mosaic-lead h3{font-size:26px}.mosaic-aside{padding:19px;grid-template-columns:1fr}.topic-matrix{grid-template-columns:1fr 1fr;gap:9px}.topic-tile,.topic-tile:nth-child(1),.topic-tile:nth-child(4){grid-column:span 1;min-height:210px;padding:15px}.topic-tile h3{font-size:17px}.topic-tile p{font-size:11px}.story-grid{grid-template-columns:1fr}.story-card{min-height:0}.status-columns{grid-template-columns:1fr 1fr}.status-columns>div{padding:15px}.status-columns h3{font-size:14px}.status-columns p{font-size:11px}.split-callout{grid-template-columns:1fr;gap:10px}.timeline-axis{gap:7px;font-size:7px}.timeline-copy{grid-template-columns:1fr 1fr;gap:12px}.timeline-copy h3{font-size:14px}.timeline-copy p{font-size:11px}.relation-map{height:240px}.relation-node{font-size:9px;padding:8px 10px}.reading-row{grid-template-columns:27px 1fr 55px;gap:8px}.reading-row p{display:none}.reading-row strong{font-size:12px}.people-strip article{padding:14px}.trust-layout{gap:25px}.brand-intent h2,.keyword-section h2{font-size:27px}.three-principles,.clarity-board,.series-grid{grid-template-columns:1fr}.topic-longread{gap:20px}.community-preview{gap:20px}.device-art{height:235px}.download-help,.privacy-card{padding:22px}.faq-home-head{gap:5px}.faq-list summary{font-size:12px}.bottom-cta{padding:25px;align-items:flex-start;flex-direction:column;margin-bottom:50px}.bottom-cta h2{font-size:24px}.page-hero{padding:38px 0}.page-hero h1{font-size:36px}.lead{font-size:13px}.hero-note{padding:20px}.prose-section{padding-top:42px}.editorial-row{gap:12px;padding:19px 0}.editorial-row h2{font-size:17px}.editorial-row p{font-size:12px}.info-band{padding:24px;align-items:flex-start;flex-direction:column;gap:17px;margin-bottom:50px}.info-band h2{font-size:22px}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-bottom{flex-wrap:wrap;line-height:1.6}.footer-bottom span:nth-child(2){order:3;width:100%}.search-dialog{padding:27px 20px}.search-form{flex-direction:column}.search-form .button{width:100%}.empty-code{font-size:90px}.empty-state h1{font-size:25px}.reader-tools{flex-wrap:wrap}}

.bookshelf-panel{padding:0 0 55px}.shelf-tabs{display:flex;gap:10px;flex-wrap:wrap}.shelf-tabs button{border:1px solid var(--line-strong);background:#fff;padding:9px 14px;border-radius:8px;font-size:12px}.shelf-items{display:grid;gap:10px;margin:18px 0}.shelf-items a{display:block;background:#fff;border:1px solid var(--line);border-radius:9px;padding:14px;color:var(--mauve-deep)}.shelf-disclaimer{font-size:11px;color:var(--ink-3)}.reader-soft{background:#f4f1e8}